Topic 7 Antihypertensive Flashcards
“Staged” HTN:
Pre-HTN (mmHg)
120-130/80-90 mm Hg
“Staged” HTN
Stage 1 HTN (mmHg)
140-160/90-100 mm Hg
“Staged” HTN
Stage 2 HTN (mmHg)
> 160/100 mm Hg
Hypertension pressures?
Sustained systolic BP > 140 (120)mmHg or a sustained diastolic BP > 90 mm Hg
Primary (Essential)
HTN is caused by a blend of nurture and nature, is generally idiopathic (what’s this?) and is the most common form (~90%)
Secondary HTN
caused by a specific etiology and is less common (~10%)
BP =
CO x SVR
most antihypertensives work to alter
blood pressure by what two things
1)Decreasing cardiac output
or
2)Decreasing peripheral resistance
CO and SVR are generally controlled by what two things?
1) The SNS and baroreceptotor feedback.
and/or
2) The Renin/Angiotensin System
Frequently HTN is treated with what type of therapy ?
“combination therapy”
more than one category of drug therapy is used to treat HTN to minimize side-effects
In critters with “stiff” arteries, having 110%
of normal blood volume can cause
profound HTN
In critters with “stiff” arteries having 95% of normal blood volume can mean
the critter’s normotensive
First line of defense against HTN
Diuretics
Why are Diuretics the first line of defense against HTN?
fairly safe (wide therapeutic margin) and inexpensive
Recent evidence indicates diuretics are
superior for treatment of HTN in what population?
In the elderly
Second line of defense against HTN
β-Blockers
β-Blockers decrease what?
Decrease C.O.
Decrease SNS “tone”
Decrease renal renin release
Nadolol
Nonselective β-Blockers
Atenolol and Lorpressor, Toprol-XL are what type of drug?
Beta 1 Selective Blockers
“Bystolic” is what type of drug?
β₁-selective and a potent vasodilator
β-Blockers are best on what demographic
Evidence suggests these are best in young &
white patients
β-Blockers are NOT best with what demographic?
NOT well suited for patients with CHF, asthma,
&/or COPD. Black patients respond relatively
poorly
Third line of defense against HTN
ACE-Inhibitors
“ACE” = stands for what?
“Angiotensin Converting Enzyme”
ACE-Inhibitors prevent what conversion?
Prevents pulmonary and renal endothelium
from converting Angiotensin I into Angiotensin II (the active form)
Commonly used as a first line drug post-MI for HTN
ACE Inhibitors
Can be used in patients with systolic dysfunction to treat HTN
ACE Inhibitors
Biggest use-limiting side-effect of ACE Inhibitors
dry cough
Captopril
Capoten
ACE Inhibitors
Enalapril
Vasotec
ACE Inhibitors
Lisinopril
Prinivil, Zestril
ACE Inhibitors
Benazepril
Lotensin
ACE Inhibitors
Fosinopril
Monopril
ACE Inhibitors
Moexipril
Univasc
ACE Inhibitors
Quinapril
Accupril
ACE Inhibitor
Ramipril
Altace
ACE Inhibitor